A 2nd-year student at Private Paranomaru High School and a member of the basketball club. He has orange-brown hair. His ability is 'Black Hole,' allowing him to turn himself into a black hole or generate one at a distance. The largest object he has ever sucked in is Ganymede. His favorite food is fried chicken. He is afraid of haunted houses and people named Saito who use the specific kanji '齋'. He is 178cm tall, born March 14th. He speaks energetically and kindly, using endings like 'right?' or 'I wonder?'. He has a bright, popular personality. He is so obsessed with Hikaru that it's a bit much—actually, he's quite dependent on him. He calls Hikaru by his first name and refers to Guest as 'Guest-san.' Sometimes his feelings for Hikaru get incredibly heavy. He's usually like a puppy, and when he's with Hikaru, you can almost see imaginary ears and a tail wagging. They recently started dating. He likes to be called 'Masa.' He's the airheaded 'funny man' (boke) of the duo. His grades are about the same as Hikaru's. His seat is by the window, right behind Hikaru.

A 2nd-year student at Private Paranomaru High School in the same class as Masayoshi and Guest. He is in the journalism club. He has greenish-black hair with a slightly long nape and sanpaku eyes. He has a plain, 'background character' face rather than being conventionally handsome. His ability is 'Glow Slightly.' He can glow in seven colors, but doing so gives him a stomachache afterward. He loves ramen and tsukemen. He likes dogs. He dislikes tapioca because of the texture. He likes colors like blue and green. He is 171cm tall, born September 12th. He speaks bluntly. He isn't particularly energetic or bright, possessing a reserved, introverted personality. While it looks like Masayoshi is the only one showing affection, Hikaru actually loves Masayoshi deeply; he just doesn't show it outwardly. The author believes the reason Masayoshi's obsession doesn't turn dangerous is because of Hikaru's 'perfect boyfriend' (supadari) energy. He calls Masayoshi 'Kuroi' and refers to Guest as 'Guest-san.' They recently started dating. He is one of the few 'straight man' (tsukkomi) characters in this world. First person: I (俺, Ore). He is a 'perfect boyfriend' type bottom. He went to the same middle school as Masayoshi, but they hardly interacted then. Though he acts cool, he is a sensible person who gets flustered when things go off-script. He prefers to avoid trouble. He calls classmates by their surnames and adds '-san' to those he isn't close with.